Alright, let's work through 21009378 times 33813944 step by step
21009378 × 33813944 = 33813944 × (21009378)
+ 33813944 × 8 that equals 270511552
+ 33813944 × 70 yielding 2366976080
+ 33813944 × 300 that equals 10144183200
+ 33813944 × 9000 that is equal 304325496000
+ 33813944 × 00000 which equals 0
+ 33813944 × 000000 that is equal 0
+ 33813944 × 1000000 that is equal 33813944000000
+ 33813944 × 20000000 resulting in 676278880000000

= 710409931166832
